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Check all local codes for requirements, especially for the size and
type of gas supply line required.
RECOMMENDED GAS PIPE DIAMETER
Pipe
Length
Schedule 40 Pipe
Inside Diameter
Tubing, Type L
Outside Diameter
Natural
Propane
Natural
Propane
0-10 feet
1/2-in
3/8-in
1/2-in
3/8-in
10-40 feet
1/2-in
1/2-in
5/8-in
1/2-in
40-100 feet
1/2-in
1/2-in
3/4-in
1/2-in
100-150 feet
3/4-in
1/2-in
7/8-in
3/4-in
NOTICE
:
Never use plastic pipe. Check to confirm whether your
local codes allow copper tubing or galvanized.
NOTICE
:
Since some municipalities have additional local codes, it
is always best to consult your local authority and installation code.
Installing a New Main Gas Shut-Off Valve
Each appliance should have its own manual gas shut-off valve.
In the Commonwealth of Massachusetts the gas shut-off valve must
be a T handle type.
A manual main gas shut-off valve should be located in the vicinity
of the unit. Where none exists, or where its size or location is not
adequate, contact your local authorized installer for installation or
relocation.
Compounds used on threaded joints of gas piping shall be
resistant to the action of liquefied petroleum gases. The gas lines
must be checked for leaks by the installer. Testing for leaks on
all exposed connections should be done with leak detection test
solution. After testing is complete, all solution should be cleaned
off. On unexposed connections, a pressure test should be made.
Never use an exposed flame to check for leaks. Appliance must
be disconnected from piping at inlet of control valve and pipe
capped or plugged for pressure test. Never pressure test with
appliance connected; control valve will sustain damage!
A gas valve and ground joint union should be installed in the gas
line upstream of the gas control to aid in servicing. It is required by
the National Fuel Gas Code that a drip line be installed near the gas
inlet. This should consist of a vertical length of pipe tee connected
into the gas line that is capped on the bottom in which condensation
and foreign particles may collect.
The use of the following gas connectors is recommended:
— ANSI Z21.24 Appliance Connectors of Corrugated Metal Tubing
and Fittings
— ANSI Z21.45 Assembled Flexible Appliance Connectors of
Other Than All-Metal Construction
Figure 3
The above connectors may be used if acceptable by the authority
having jurisdiction. The Commonwealth of Massachusetts requires
that a flexible appliance connector cannot exceed three feet in length.
A gas valve and ground joint union should be installed in the gas
line upstream of the gas control to aid in servicing. It is required
by the National Fuel Gas Code that a drip leg be installed near the
gas inlet.
See Figure 4.
This should consist of a vertical length of
pipe tee connected into the gas line that is capped on the bottom
in which condensation and foreign particles may collect.
Figure 4
GAS SUPPLY
